In 2004, as Sheena Johnson, she became the youngest woman ever to be clocked under 53 seconds (52.95). She won NCAA and U.S. titles and was the world leader heading into the Athens Olympics. She left without a medal, though, placing fourth.

The following roster was named Monday by USA Track and Field officials as this year's world championship team. The championships will be held in Osaka, Japan, from Aug. 25-Sept. 2. (x-reigning world champion):

Jeremy Wariner, who ran the fastest 400 meters since Michael Johnson's heyday, is USATODAY.com's U.S. Olympic Athlete of the Week. Also nominated: rowers Anna Mickelson and Megan Cooke, who won the women's pairs in a World Cup race in Switzerland.

Bernard Lagat, who ran the fastest 1,500 meters of the year and beat a 20-year-old U.S. record in the process, is USATODAY.com's U.S. Olympic Athlete of the Week. Other nominees: Dwight Phillips, Brad Walker, Justin Gatlin, McLain Ward.

Hurdler Allen Johnson, who beat Chinese rival Liu Xiang and posted the best time in the world this year, is USATODAY.com's U.S. Olympic Athlete of the Week. Other nominees: Michelle Perry, Wallace Spearmon, Darold Williamson, Kerron Clement, Jenny Topping, Courtney Paris.

Allyson Felix opens this season Friday at the Millrose Games under her new coach, running in the 60 so she can work on her start. Several other big-name Olympians join Felix at the 98th edition of the meet at Madison Square Garden. Pole vaulter Stacy Dragila is going for her seventh Millrose title.

In the same way that once-belittled Greece has shocked the world by putting on an efficient and successful Olympics, so did Fani Halkia emerge from the shadows Wednesday with a stunning triumph for the host nation.